Laserfiche WebLink
Cabrillo at First Mixed-Use Residential <br /> Air Quality, Global Climate Change, HRA, and Energy Impact Analysis <br /> 45 19386 <br />percent for particulates 1.0 micron to 10 microns in size and a rating of 75 percent for particles 0.3 to 1.0 <br />micron in size.11 A MERV 13 filter creates more resistance to airflow because the filter media becomes denser <br />as efficiency increases. The MERV filters do not remove gaseous pollutants; however. See Mitigation <br />Measure 1 in Section 6 of this report for details. Therefore, indoor (interior) exposure to DPM (of particles <br />greater than 1.0 micron) and consequently cancer risk a most-affected receptor (closest to the I-5 freeway) <br />would be reduced by 90 percent, to 7.58 in one million; less than the 10 in one million SCAQMD threshold. <br />Outdoor levels, such as those experienced at the recreation area on-site, would still present a risk level <br />exceeding the SCAQMD MICR threshold of 10 in one million. <br /> <br />Non-Cancer Risks <br /> <br />The relationship for non-cancer health effects is given by the equation: <br /> <br />HIDPM = CDPM/RELDPM <br /> <br />Where, <br />HIDPM = Hazard Index; an expression of the potential for non-cancer health effects. <br />CDPM = Annual average diesel particulate matter concentration in µg/m3. <br />RELDPM = Reference Exposure Level (REL) for diesel particulate matter; the diesel particulate <br />matter concentration at which no adverse health effects are anticipated. <br /> <br />The non-carcinogenic hazards to adult, child and infant receptors are also detailed in Tables 13 through 16 <br />column (j). The RELDPM is 5 µg/m3. The Office of Environmental Health Hazard Assessment as protective <br />for the respiratory system has established this concentration. Using the maximum DPM concentration from <br />years 2023-2053, the resulting Hazard Index is: <br /> <br />HIDPM = 0.12136/5 = 0.0243 <br /> <br />The criterion for significance is a Hazard Index increase of 1.0 or greater. Therefore, the on-going operation <br />of the proposed project would not result in a significant impact due to the non-cancer risk from freeway- <br />related diesel emissions. <br /> <br />11 Source: https://www.iso-aire.com/blog/what-are-the-differences-between-a-merv-13-and-a-hepa-filter <br />456/27/2022 <br />Planning Commission 2 –98